Petr Bar Biryukov advanced past Tianhui Zhang in the ITF M15 Maanshan 7 Round of 16. Biryukov built on his August 19 2-0 win over Ziheng Xia and leveraged his ATP ranking of 281 to move through, ending Zhang's run after Zhang had beaten Qian Sun 2-1 on August 19. The match was their first main tour…